field kubernetes_sd_configs not found in type config.plain

[quanvuminh]

Bug Report

What did you do?

Tried to use Kubernetes SD with Prometheus outside of the K8s cluster
What did you expect to see?

It works!

What did you see instead? Under which circumstances?

promtool failed to parse configuration

Environment

• System information:

  Linux 4.9.0-6-amd64 x86_64

• Prometheus version:

  prometheus, version 2.3.2+ds (branch: debian/sid, revision: 2.3.2+ds-1~bpo9+1)
  build user: pkg-go-maintainers@lists.alioth.debian.org
  build date: 20180805-18:46:45
  go version: go1.10.3

• Prometheus configuration file:

scrape_configs:
- job_name: kubernetes-nodes
  kubernetes_sd_configs:
  - api_server: https://apiserver:6443
    role: node
    tls_config:
      ca_file: "/etc/kubernetes/pki/ca.crt"
      cert_file: "/etc/kubernetes/pki/apiserver-prometheus-client.crt"
      key_file: "/etc/kubernetes/pki/apiserver-prometheus-client.key"
      insecure_skip_verify: true
  relabel_configs:
  - action: labelmap
    regex: __meta_kubernetes_node_label_(.+)
  - target_label: __address__
    replacement: apiserver:6443
  - source_labels:
    - __meta_kubernetes_node_name
    regex: (.+)
    target_label: __metrics_path__
    replacement: /api/v1/nodes/${1}/proxy/metrics
  scheme: https
  tls_config:
    ca_file: "/etc/kubernetes/pki/ca.crt"
    cert_file: "/etc/kubernetes/pki/apiserver-prometheus-client.crt"
    key_file: "/etc/kubernetes/pki/apiserver-prometheus-client.key"
    insecure_skip_verify: true

• Logs:

# promtool check config /etc/prometheus/prometheus.yml.k8s
Checking /etc/prometheus/prometheus.yml.k8s
  FAILED: parsing YAML file /etc/prometheus/prometheus.yml.k8s: yaml: unmarshal errors:
  line 3: field kubernetes_sd_configs not found in type config.plain

[simonpasquier]

You're using the Debian package which doesn't support the Kubernetes service discovery (see here).